Number of 6-element nondividing subsets of {1, 2, ..., n}.

Terms

a(0) =1a(1) =3a(2) =4a(3) =7a(4) =15a(5) =27a(6) =45a(7) =55a(8) =85a(9) =133a(10) =199a(11) =262a(12) =378a(13) =534a(14) =803a(15) =999a(16) =1319a(17) =1742a(18) =2309a(19) =3007a(20) =4020a(21) =5166a(22) =6565a(23) =7950a(24) =10380a(25) =12882a(26) =16533a(27) =19664a(28) =24099a(29) =30912